Just several from the top of my head...
Batman and Robin (Sega Genesis) - It was a horrible platform game with equally horrible mechanics. I never made it past the first level :/
Batman Forever (Sega Genesis) - Just one of the most awful game ever created in the 90s. Using combos on the six-button controller was a nightmare.
Saga Frontier + Saga Frontier 2 (PS1) - They're supposedly RPGs, but I a spent long time just reading cut-scene text in Saga Frontier 2. I actually don't believe that there's any gameplay at all
.
Miscellaneous Jane's flight simulators (PC) - It was nice flying around jets, but the games were generally unpolished. I often found myself going back to Star Wars: Tie Fighter (which is arguably, one of the best simulators ever released).
EVERY Gundam game, ever (PS2 and PS3) - I wasted so much money behind those POS games. I bet that Bandai was paying off Famitsu for good reviews.